What’s This?

[FishFinatic ;)]

So, I was looking at my live rock and found some weird fuzzy stuff on it... that’s the best way to describe it. Not sure what it is.... any ideas?

*I attached some pictures so have a look?

 

[Flippers4pups]

Looks like Calothrix.

 

[FishFinatic ;)]

Looks like Calothrix.

What’s that?? Is it bad?

 

[Flippers4pups]

Here's some Info:

https://www.reefcleaners.org/nuisance-algae-id-guide

Like I say, it looks like it.